Method for oscilloscope 3D mapping in scan mode

Abstract

A method for oscilloscope 3D mapping in scan mode. The input signal is acquired using a real-time sampling rate which is Dr times higher, thus more sampling points, i.e. Dr acquired data can be obtained during the time interval between two consecutive horizontal pixels. The Dr acquired data are mapped into a same column of the screen to implement fluorescent waveform display. In addition, to realize the scanning display, a flag X is introduced into the three-dimensional database, when the screen refresh signal arrives, the first Ds acquired data are read out from the unread acquired data in FIFO memory. The three-dimensional database is updated from the flag X, which make the leftmost waveform always be the oldest waveform, the rightmost waveform always be the newest waveform. Thus the 3D mapping is realized in scan mode, letting the DSO have a fluorescent waveform display at slow time-base.

Description

FIELD OF THE INVENTION[0001]This application claims priority under the Paris Convention to Chinese Patent Application No. 201711118232.7, Filed on Nov. 14, 2017, the entirety of which is hereby incorporated by reference for all purposes as if fully set forth herein.[0002]The present invention relates to the field of waveform display, more particularly to a method for oscilloscope 3D (three-dimensional) mapping in scan mode.BACKGROUND OF THE INVENTION[0003]Scan mode is a special way of waveform display, when the oscilloscope is at slow time-base. As the oscilloscope screen refresh cycles are basically the same, when the time base of the oscilloscope is larger, i.e. at slow time-base, the time of acquiring a frame of waveform will be greater than the screen refresh circle. At this point, all the data acquired in the screen refresh cycle are read out, and still can't form a frame of complete waveform, thus, “scan mode” is adopted to display the waveform.[0004]The waveform display in sc...

AI Technical Summary

Benefits of technology

The present invention provides a way to display fluorescent waves in slow motion using an oscilloscope. This was previously difficult to do in scan mode. The technical effect is the ability to capture and display the fluorescent waves in a new and useful way.

Problems solved by technology

However, the three-dimensional mapping needs to acquire multiple frames of waveform in one screen refresh cycle, and in the traditional scan mode, the digital storage oscilloscope at slow time-base will spend a long time acquiring a frame of waveform, a whole frame of waveform can't be acquired in one screen refresh cycle.

Therefore, multiple frames of waveform for three-dimensional mapping can't be obtained in scan mode, then there is no fluorescent waveform display on the screen of digital storage oscilloscope.

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